Abstract
The photochemical reactions and photophysics of long chain coumarin esters have been investigated. In dioxane-water (DX-H 2O) solvent mixture, long chain 4-methyl-7-hydroxycoumarin hexadecanate and octadecanate form aggregates forced by the hydrophobic effect. The photochemical reactions of this two long chain coumarin esters gave exclusively anti-HT dimer in 75% and 90% yields respectively in dioxane-water(volume ratio 1 : 2) solvent mixture. The excimer formation and the acceleration of photochemical reaction were ascribed to the hydrophobic effect and the changes of microenvironment.
| Original language | English |
|---|---|
| Pages (from-to) | x20-1613 |
| Journal | Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities |
| Volume | 19 |
| Issue number | 10 |
| Publication status | Published - 1998 |
| Externally published | Yes |
Keywords
- Coumarin
- Excimer
- Photochemistry